mkfs.ext4dev(8) on Linux
The text cd7eb75c1601, as Debian 8 (Jessie) shipped it. The page shows this text now.
create an ext2/ext3/ext4 filesystem
Flags it lists
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-C -
-D -
-F -
-O -
-S -
-V -
-c -
-j -
-n -
-q -
-v